Valve for internal-combustion engines.



J. L. QUINN.

VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JAN. 24, 1914.-

1,16 2,189. Patented Nov. 30, 1915.

Zak/- 5% mounted in the cylinder head 3, said head' JOHN L. QUINN, OF LOS AN GELES, CALIFORNIA, ASSIGNOR OF ONE-HALF T0 H. T. HARPER, OF SAN FRANCISCO, CALIFORNIA.

VALVE FOB. INTERNAL- COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Nov. 30, 1910.

Application filed January 21, 1914. Serial No. 814,088.

ject of the invention is to; provide valve means which will be silent in operation, and will be subject to the minimum of wear.

Another object of the invention is toprovide valve means for this purpose in which the same members serve for exhaust and inlet valves. A further object of the invention is to provide valve means which will increase the efiiciency of the engine and make it more economical in operation by providing for more effective scavenging and admission of Other objects of the invention will appear hereinafte The accompanying drawings illustrate an embodiment of the invention, and referring thereto: Figure 1 is a vertical section of the engine. Fig. 2 is a vertical section transverse to Fig. '1, with the crank case in elevation. Fig. 3 is a horizontal section on line v -11? in Fig. 1. Fig. 1 is a plan view of a .multi-cylinder engine, showing the operating means for the valves.

InFigs. 1 to 3, the engine is shown as a single cylinder engine, it being understood that the same construction with suitable modifications, is applicable to any number of cylinders. 1 designates the engine cylinder, 2 the crank case, and 3 the cylinder head. The usual piston 4 is provided, connected by rod 5 to the crank 6 on the main shaft 7 of the engine, said shaft being provided with usual fly wheel 8.

The exhaust and inlet valve devices are being hollow and provided with an internal valve cylinder 10 extending transverselythrough the head. 'Saidvalve cylinder is provided in its lower wall with ports 11 and 12 communicating with the interior of the cylinder 1 and in its upper wall with ports 13 and l communicating with inlet and exhaust pipes 15 and 16. Said valve cylinder 10 may be connected to the outer'walls of the cylinder head 3 by webs or ribs 17, so as to brace the same, the spaces between said ribs communicating by openings 18 in the head with the space 19 within the water jacket 20 of the engine cylinder 1, whereby provision is made for continual circulation of cooling fluid through the head as well as around the cylinder 1.

Within the valve cylinder 10 is mounted to slide a valve sleeve 21 andwithin said sleeve 21 is mounted to slide a cylindrical valve plug 22, said sleeve-21 being provided with upper ports 23 and 24; with. lower ports 25 and 26, and said valve plug being provided with vertical ports 27 and 28. The said valve plug 22 is connected by rod 30 to an eccentric or crank 31 on a shaft 32 which is connected by suitable means; for example, sprockets 34: and "35, and sprocket chain 36. to the main shaft 7 of the engine, soias to rotate at one-half the speed of said main shaft. 39 designates a spark plug mounted in the head 3 of the engine. Suitable means are provided for oiling the valve cylinder, for example, an oil pipe 40 communicating with the interior of such cylinder at the top thereof, so as to distribute the oil to. the cylinder and to the sleeve sliding therein, and through the ports in said sleeve to-the plug 22 within the sleeve. Packing rings-4:1 are provided on the exterior of the sleeve 21 for making a gas tight joint with the valve cylinder, and packing rings 42 are provided on the valve plug 22 for making a gas tight joint between the valve plug and the sleeve,

these packing rings being located between such position as to open the inlet ports, this being the position occupied when the engine piston 4 is descending and drawing in moisture. In this position with the parts arranged as shown in the drawings, the valve plug 22 is at the extreme left handposition and the valve sleeve21 is at the extreme. right h nd position, so as-to cut ofi the communication with the exhaust ports. In the" arrangement in combination with the extenfurther movement of the engine the valve plug 22 moves to the right and the valve sleeve 21 simultaneously moves to the left, so that the ports in said plug and sleeve move over one another very rapidly in opposite directions,resulting in a quick closing action of the ports. This closing action is completed when the piston has completed its downward stroke and in the ensuing upward stroke the said valve members continue in the same direction of movement, and when the operating crank or eccentric 31 has completed half a rotation corresponding to a full rotation of the main shaft 7, the said valve members have moved sufficiently far in this direction to begin to open the other ports communicating with the exhaust ports 12 and 16. These ports remain open during the up stroke of the engine piston and during such up stroke, the crank or eccentric 31 passes the dead center so that the operation of the valve members 22 and 21 is reversed and the said members begin to close exhaust port communication, this closing operation being completed when the piston reaches the upper end of its stroke, thereby completing the cycle.

It will be noted that the valve sleeve and plug move in opposite directions during the closing as well as during the opening operation thereof, so that they provide for closing and opening a largezone area, with extreme rapidity. This enables great economy of operation, particularly on account of the clean scavenging thereby provided for and the full admission of clean mixture which results from the large port area provided.

The cylinder and the sleeve in being open provide for entrance of air therein. This sion of the water jacket into the head and about the valve provides for the effective cooling of the valve and insures proper operation thereof. Furthermore, the valve may be inspected from the outside and lubricated easily in View of the open construction of the valve sleeve and easing.

Another important advantage of the invention is the lack of jar and noise accompanying the action of the valves. This feature is of especial advantage in connection with large units and also in submarine and other Work where the noise of the valves 'is especially objectionable.

In applying the invention to a multicylinder engine the shaft 32 for operating the cranks or eccentrics, see Fig. 4, for the valves of the respective cylinders 1 is extended so as to operate all of said valve devices from a single shaft.

What I claim is:

In a valve the combination with an internal combustion engine including a cylinder having a head formed with a valve cylinder, said valve cylinder having intake and exhaust ports in the top and bottom thereof and being open at both ends, said bottom ports communicating with the engine cylinder, of a valve sleeve slidably mounted inthe valve cylinder, a valve plug reciprocably mounted in the sleeve and having ports extending therethrough for controlling communication between the upper and lower intake and exhaust ports respectively and means for reciprocating the valve sleeve and valve plug in opposite directions.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 13th day of January, 1914.

JOHN L. QUINN.

In presence of" A. P. KNIGHT, LORRAINE E. DURROW. 

